CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Loss
Beginning balance at Dec. 31, 2021	$ 245,798	$ 7,753	$ 204,276	$ 112,220	$ (78,904)	$ 453
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	8,258			8,258
Cash dividends	(3,832)			(3,832)
Issuance of common shares pursuant to stock-based compensation plan, net	(490)		(1,889)		1,399
Exercise of SARs	(85)		(328)		243
Stock-based compensation expense	1,090		1,090
Purchase of common shares	(5,086)				(5,086)
Other comprehensive income (loss)	(28,575)					(28,575)
Ending balance at Mar. 31, 2022	217,078	7,753	203,149	116,646	(82,348)	(28,122)
Beginning balance at Dec. 31, 2022	206,325	7,753	207,422	131,682	(81,211)	(59,321)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	7,117			7,117
Cash dividends	(3,977)			(3,977)
Issuance of common shares pursuant to stock-based compensation plan, net	(850)		(2,520)		1,670
Exercise of SARs	(116)		(238)		122
Stock-based compensation expense	1,950		1,950
Other comprehensive income (loss)	7,051					7,051
Ending balance at Mar. 31, 2023	$ 217,500	$ 7,753	$ 206,614	$ 134,822	$ (79,419)	$ (52,270)